Anyone gotten cracks in their shops concrete floor from using red heads

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The spokesperson at red head is just covering their *ss. They will be plenty sufficient in this application. The epoxy would be like using a semi truck to haul a couple 2x4's. wedge anchors as i have already said are incredibly strong, even pull out. You could even use 1/4" ones probably and never have a problem. 4 @ 5/8 is so overkill it's a joke. And your going into seasoned Crete, which is better for this type of anchor.

I have had to bed wedge anchors only 2 1/2" due to hydronic heating lines being cast into a slab, and when bolting down the mud sills with my 18" wrench I can practically sink a 1 1/2" diameter washer through a 2x6 if I wanted to do so. They just keep on crushing the more I torque them. I have never pulled an anchor out no matter the size or torque applied.

Exactly. Good luck with your table. I like to position what ever I am securing in place, with slightly over sized holes than the anchor, then roto hammer right through the flange, pound in the anchor with washers pre installed till it bottoms, then tighten her up. That way there is no chance for misalignment.

Exactly. Good luck with your table. I like to position what ever I am securing in place, with slightly over sized holes than the anchor, then roto hammer right through the flange, pound in the anchor with washers pre installed till it bottoms, then tighten her up. That way there is no chance for misalignment.

Thanks for the tip Cgotto6. I left a message with the son to see if he has a roto hammer I can borrow. I have to find the anchors tomorrow. I might have to order them. I think I'm going with 1/2 X 3.

Should I drill a 9/16 hole? I was going to drill a 1/4" pilot hole first then drill the larger hole is that OK? I don't have anytime running a Roto Hammer and don't want to make a mess of it.

4 Inch thick seems quite thin for shop floor....my house here in TX built in 2006 has 8 inch thick for the house and my garage (1,800 sq ft) I specified 10 inch and it is poured with a waffle pattern on 3 ft squares at 16 inch thick and it all has rebar. I did this because I had planned to install a lift (8,000 lb capacity) for lifting my cars and pickup (5,600 lb) I have been in here now since Sept 2006 and not one crack.

Tackit, When Cgottosaid said oversized hole in a earlier post I'm pretty sure what he meant was to make sure the hole in the steel plate was at least a 1/6" bigger than the hole that you drill into the concrete, Otherwise the anchor itself will get caught on the steel plate.

The anchors are a tad bigger than the hole you drill in the concrete.

Like S Berry said, Do not pilot drill and use a 1/2" bit for a 1/2" anchor.

Cgotto6, I have never heard of a ROTO Hammer, Here in the big city we call them a Hammer Drill.